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Variation in the free amino acid content of skeletal muscle of Ophicephalus punctatus (Bloch)
Author(s) -
Siddiqui Abdul Q.,
Siddiqui Anwar H.
Publication year - 1977
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.1977.tb04052.x
Subject(s) - amino acid , valine , methionine , leucine , phenylalanine , biology , alanine , cystine , histidine , glycine , biochemistry , isoleucine , arginine , serine , amino acid synthesis , proline , lysine , tyrosine , threonine , cysteine , enzyme
The skeletal muscle of Ophicephalus punctatus contains nine essential free amino acids, arginine, histidine, isoleucine, leucine, methionine, phenylalanine, threonine, valine and lysine, and eight non‐essential amino acids, alanine, aspartic acid, cystine, glutamic acid, glycine, tyrosine, proline and serine. Histidine and lysine dominated the free amino acids pool. Seasonal variation was detected in the levels of histidine, arginine, leucine, phenylalanine, glycine, cystine and serine with highest values occurring in April and again in November. Changes were also detected in the concentrations of certain amino acids as the fish grew in size. Levels of free amino acids did not significantly differ between sexes. Factors effecting variation are discussed.